Wear is reduced in abrasive slurry service at an outlet into an annular space defined by the wellbore and around the tool. In a gravel packing application with a crossover, the slurry exits a central passage and goes into an internal annulus in the tool. Turning vanes that make at least one full turn and that have a height at least partially the height of the annular space are there to impart a swirl movement to at least a portion of the slurry stream. The swirling motion has beneficial effects of reducing turbulence which allows a velocity reduction for a comparable output volume. As a result of the lower turbulence leading to the final exit from the tool into the surrounding annulus, the exit ports experience reduced erosion and longer service life.
申请公布号
WO2009149255(A2)
申请公布日期
2009.12.10
申请号
WO2009US46253
申请日期
2009.06.04
申请人
BAKER HUGHES INCORPORATED;CLEM, NICHOLAS, J.;CORONADO, MARTIN, P.